It is probably easier for teachers than for students to appreciate the reasons why learning English seems to become increasingly difficult once the basic structures and patterns of the language have been understood．

单项选择题What did the students find out about McKay

问答题在万圣节人们通常穿上戏装。

单项选择题Both of them are interested in ______.

问答题Chinese people nee getting accustomed to using credit cards，but not yet to personal checks，which have long been popular in the Western countries：

单项选择题What is the main idea of the passage

单项选择题A．exciting B．pleasant C．tough D．significant

单项选择题What made Professor Broad continue his search for more information on McKay

单项选择题The couple have not got a television, because ______.

问答题外语学习的基本条件是什么

多项选择题合作学习理论认为，在班级教学中，学生群体的组织形式有三种，即( )。